Air-circulating system for vacuum-producers.



C. G.' CAMPBELL @L M. BENBROOK.

AIR OIRGULATING SYSTEM POR VACUUM PRODUCERS.

APPL'lOATION FILED AUG. 15, 1912.

Patented. Feb. 1s, 1913.

2 minus-SHEET 1.

wwf

C. GQGAMPBELL &, M. BENBROOK.

AIR CIRGULATING'SYSTBM FOR VACUUM PRODUCERS..

APPLICATION FILED AUG. 15, 1912.

Patented Feb..18, 1913.

2 SHEETS-SHEET 2.

mi f Qy/Yvwwoz/a':

ness-mee.

-nism 'comprising a narran sras;nsA rarest orrrcn.

CHARLESVG. CAMPBELL AND MONROE BENBROOK, OF MILWAUKEE, VISCONSIN, AS-SIGNORS TO THE CREAMERY PACKAGE MFG.. COMPANY, OF CHICAGO, ILLINOIS.

AIR-CIRCULATING -SYSTEM/ FOB.` VACUUM-PRODUCERS.

Specification. of Letters Patent.

rai-musa Feb. 18,1913.

Application filed Auust 15, 1912. Serial No. 715,155.

To all 107mm it may concern.'

Be it known that. We, CHARLES G. Cani?- BELL and lif'ionuon BENnRooK,both citizens of the United States, and residents of Milwaukee, in thecounty of ltlilv'aukee and State of lWisconsin, have inventedl cer-tainnew and useful lmprovements in Air- Circulating Systems forvi/Yacuum-Producers; and we do hereby declare that the' following is afull, clear, and exact description thereof.

Our invention refers to vacuum producing apparatus especially Vdesignedfor use in connection with dust-collecting separators, its object beingto provide a simple, economical, effective air-circulating systemtherefor.

The construct-ion and arrangement'. of our present invention is suchthat back-pressure is avoided and more uniform distribution of airadmit-ted to and exhausted from a suction chamber, which chamber isdivided into upper and lower compartments separated by a screen orpartition through which the air is adapted' totravel, whereby themaximum suction capacity is obtained by fans of a predetermined capacityrelativetfo the expenditurel of power. Another advantage of our novelarrangement of air distributionis that the full area of the chamberscreen surface is utilized for separating the'dust from the outgoingfiltered air, whereby clogging df the screen at one point is avoided,resulting in an even application of Athe motive force to the fanelements, the apparatus as herein fully dcscribed with reference to theaccompanying drawings and claimed, being particularly applicable tosuchdevices as disclosed in an application for patent for improvementsin vacuum-cleaner apparatus, tiled by us March 8, 1912', Serial Number(382,362.

.In the drawings Figure 1 represents an elevation of an apparatusembodying the features of cur invention with parts broken away and partsin section as indicated by line 1-1 of Figs. 2 and 3; Fig. 2, a planview of the same, and Fig. 3, a sectional elevation of the apparatus,the section being indicated by lines 3-3 of Figs. l 'and 2.

lReferring by characters to the drawings, 1 represents a suctionchambel1 provided with a cover-plate 2 that constitutes a supporting bedfor a vacuum producer mechapair of alined' fancasings 3, of the snailtype, havingfans 3 therein, which lfans are mounted directly i upon theopposite ends of a shaft 4 that car" ries the armature of an electricmotor 5, the

motorbcing secured to the cover-plate 2 intermediate of said fancasings, through an interposed bracket. The suction cham er 1 is dividedinto upper and lower compartments tl and 7 respectively by ascreen-cloth partition-wall 8 that is located just below the cover-plateand parallel thereto. The lower compartment 'Tof the suction-chamber lis provided with the usual removable dust-receiving tray 9, all o-fwhich specific chamber' elements form no partof our prescntinvention,except so far as they cooperate to accomplish the desired result in acirculating system of the character herein described. I

The cover-plate 2 is provided with opposi tely disposed end suctionports 2 that communicate with the upper chamber compart ment (l, theports being adjacent to the end's of said compartment. Each port isconnect-- ed to a suction mouth l0 of a juxtaposed fancasine by a hollowleg 11. The fan casings are a so provided with the usual peripheraldischarge leg 12, which legs in turn are conlnected to oppositelyextended branch tubes 12', 12', of a common main exhaust pipe 13 that isopen to atmosphere. The cover-plate 2 is also provided with a pair ofoppositely disposed and transversely arranged apertures 14C, throughwhich apertures are fitted branch suction tubes 15 that connectto acommon suction or stand-pipe 16, the same being provided with aplurality of nipples 16 for attachment to suction nozzles, not shown.tubes l5 extend through the upper compartment G of the suction chamberand also through suitable apertures in the screen partition 8 havingtheir mouths in communication with the lower compartment. of saidsuction-chamber, whereby dust-laden .airdelircred from the suction tubeslfis trapped therein. Y

From the foregoing description it. will be secu that air is admitted attwo points to the lower compartment of the suction chamber and.centrally thereof, the points of air admission being adjacent to theside walls of The ends of the branch suction.

the chan'iben while thtl exhaust from the v screen. Hence it is apparentthat the dustfiltered.

laden currents of air from the suctionmout-hs of the tubes will be drawnover .the under sideof the screen 8 in opposite directions, the airbeing thus broken u'p into thindiverging sheets coincident to its travelas it rises upward through the screen and is This ltered air isthereafter drawn 01T from'the upper compartment of the suction chamberat its opposite ends,l

whereby the opposing cross-currents ot air 'caused through thepositioning of the various ports tends to more evenly distribute saidair, which distribution will thus cause the 4entire screen surface to beutilized as a dust and air separating medium, whereas under the usualconditions all of the air is directed to a small area of the screensurface, thus choking the same, whereby not only the efficiency of theseparator or suc-v tion chamber is impaired, but the suction or pullingpower of the air is unduly loaded,

due to back pressure or choking of the air currents.

With our arrangement of air` circulation the above mentionedobjectionable features are overcome and the apparatus, as practicallydemonstrated, shows `an increased suction capacity rela-tive to th'emotive force employed and also great eliciency in separation due to thefact of the position of the various suction and exhaust ports in thechamber and the proportion of the various pipes or channels 'comprisingthe circula-ting system, whereby a free and even circulation of air sobtained, to thus prevent fluctuations in the load that is applied to amotor of a predetermined capacity.

We claim: Y, l`

In va 'circulating system for vacuum producers; the combination of asuction chamber having a division screen therein, an eX- haust pipehaving branches in communication with opposite ends of thechambcr abovethe screen, a vacuum producer interposed in each branch pipe, and an air'discharge stand-pipe having branches that communi-A CHARLES G.CAMPBELL. MONROE BENBROOK.

Witnesses GEO. W. YOUNG, M. E. DowNEY.

